A self-adjusting mechanism of schottky junction constructed by zero-bandgap graphene for highly efficient electrochemical biosensing. (1st September 2017)

• Record Type: Journal Article
• Authors: Zhao, Minggang; Ding, Longjiang; Li, Hui; Fan, Sisi; Chen, Shougang
• Is Part Of: Electrochimica acta. Volume 247(2017)
• Page Start: 306
• Page End: 313
• Publication Date: 2017-09-01
• Subjects: Electrochemical biosensing -- Graphene -- Schottky junction -- Self-adjusting mechanism -- Biomarker; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.07.021
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Constructing schottky junction with zero-bandgap graphene was innovatively achieved by electrochemical reduction and deposition of GO on NiO foam directly. The fabricated 3D graphene/NiO foam exhibited highly efficient sensing performance towards positively charged dopamine molecules. The main mechanism is that the adsorbate-induced charges could change the schottky barrier height, following by selectively enhancing or depressing the electrochemical responses of different charged analytes. The proposed self-adjusting effects of schottky barrier on electrochemical signals were theoretically and experimentally explored in depth. As a result, it can help to break the limitation that analytes with similar redox properties are difficult to distinguish by electrochemical methods